Controle iTunes from inside another program?

I know that there's something out there that does this, but I've got no idea what it's called.

I want to be able to pause/play, skip, and replay from inside games. Something that uses the F14-16 buttons would be nice. I play C&C Generals while listning to podcasts, and I'd like a way to controle them with out having to quite eachtime I need to pause for a minutes or two.

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